I find this somewhat amusing, as back in the day, you were really stretching it to get 1HP per cube out of a performance street motor. The best Chrysler could do on the 340 was 275 in '68 (yes, I realize this was de-rated from a more realistic 325). IIRC, their most powerful engine was the 425HP dual quad 426 hemi...1 horse short of a "square" engine. Nowadays a a 400 horse 340 is considered a "mello build".
